Television viewers know Ian Harding as Ezra Fitz on Freeform’s “Pretty Little Liars” — the role that won him seven Teen Choice Awards. With the release of his first book, “Odd Birds” (St. Martin’s Press, $25.99), he can also add author to his resume. In his collection of essays, Harding shares vignettes of his life in Hollywood, interspersed with tales about his hobby, bird-watching. Harding will next be seen in the indie film “Office Uprising.”